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Low-ammonia-nitrogen-concentration sewage mainstream anaerobic ammonia oxidation system for limiting nitrifying bacteria through antibiotics and process thereof

A technology of anaerobic ammonium oxidation and limited nitrification, which is applied in the field of mainstream anaerobic ammonium oxidation process of low ammonia nitrogen concentration sewage, can solve the problems such as difficult control of nitrosation section, reduce energy consumption and chemical dosing costs, and reduce organic carbon load Effect

Pending Publication Date: 2021-12-31
TONGJI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a mainstream anaerobic ammonium oxidation system for low ammonia nitrogen concentration sewage where antibiotics limit nitrifying bacteria and its process, which solves the problem that the nitrosation section is difficult to control when the PN-A process treats low ammonia nitrogen concentration sewage, and contributes to anaerobic Application of Oxyammonium Oxidation Process in Mainstream Sewage Treatment Field

Method used

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  • Low-ammonia-nitrogen-concentration sewage mainstream anaerobic ammonia oxidation system for limiting nitrifying bacteria through antibiotics and process thereof

Examples

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Effect test

Embodiment 1

[0057] Sewage ammonia nitrogen concentration 500-1000mg / L, COD concentration 300-500mg / L, SS 150-500mg / L

[0058] Sewage with low ammonia nitrogen concentration enters the mainstream anaerobic ammonium oxidation process. The specific process is as follows: sewage enters the pretreatment system, and the grille intercepts large suspended particles. Then it enters the activated sludge decarbonization biological tank and stays for 20 hours, 80% of COD is removed, and the COD concentration of the effluent of the pretreatment unit is 60-100mg / L. Since there is no carbon source and alkalinity dosing in the pretreatment unit, 10% of ammonia nitrogen is removed. The concentration of ammonia nitrogen in the effluent of the pretreatment unit is 450-900mg / L. Enter the nitrosation tank, and put in 1mg / L antibiotics (including but not limited to oxytetracycline, metronidazole, furazolidone, gentamicin, etc.), and the hydraulic retention time is 20 hours. 50% of ammonia nitrogen is convert...

Embodiment 2

[0060] The concentration of ammonia nitrogen in sewage is 300-500mg / L, the concentration of COD is 300-500mg / L, and the concentration of SS is 150-500mg / L.

[0061] With example 1, the difference is that the hydraulic retention time of the nitrosation tank is 10 hours, and the hydraulic retention time of the anaerobic ammonium oxidation tank is 5 hours.

Embodiment 3

[0063] The concentration of ammonia nitrogen in sewage is 300-1000mg / L, the concentration of COD is 100-300mg / L, and the concentration of SS is 150-500mg / L.

[0064] With example 1 or example 2. The difference is that the hydraulic retention time of the activated sludge decarbonization biological pool is shortened to less than 5 hours.

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Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a low-ammonia-nitrogen-concentration sewage mainstream anaerobic ammonia oxidation system for limiting nitrifying bacteria through antibiotics and a process thereof. The system comprises a pretreatment unit, a denitrification unit and a deep treatment unit. The process comprises the following steps: stage 1, low-ammonia-nitrogen-concentration sewage passes through a pretreatment device, large-particle suspended solids in water are removed by a grating or a primary sedimentation tank, and the sewage enters a decarburization biological tank to degrade organic carbon in the water; stage 2, antibiotics are added into the nitrosation section; stage 3,deep treatment is carried out on the anaerobic ammonia oxidation effluent in the third stage through an MBR biological tank or a deep filter tank, and the effluent is discharged after the effluent meets the discharge standard. According to the invention, the problem that the nitrosation section is difficult to control when the PN-A process is used for treating the sewage with low ammonia nitrogen concentration is solved, and the application of the anaerobic ammonia oxidation process in the field of mainstream sewage treatment is facilitated.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a mainstream anaerobic ammonium oxidation process for low ammonia nitrogen concentration sewage where antibiotics limit nitrifying bacteria. Background technique [0002] Under anaerobic conditions, the anaerobic ammonium oxidation process uses inorganic ammonia as the electron donor and nitrate or nitrite as the electron acceptor to oxidize ammonia into nitrogen, which saves 60% compared with the whole process of nitrification (ammonia oxidation to nitrate). % of oxygen supply. Using ammonia as an electron donor can also save the carbon source required in the traditional biological denitrification process. Partial nitrosation-anammox process (PN-A process) is a common process for the application of anammox technology. The partial nitrosation section (PN) oxidizes more than half of the ammonia nitrogen in the reactor to nitrite nitrogen, which is an anaerobic...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F101/16
CPCC02F3/307C02F3/34C02F2101/16
Inventor 宫徽丁健宁戴晓虎顾国维
Owner TONGJI UNIV
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